{"id":21915,"date":"2003-04-03T00:00:00","date_gmt":"2003-04-03T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/destinos-alternativos-de-celulas-proliferantes-de-plantas-tratadas-con-radiacion-ionizante\/"},"modified":"2003-04-03T00:00:00","modified_gmt":"2003-04-03T00:00:00","slug":"destinos-alternativos-de-celulas-proliferantes-de-plantas-tratadas-con-radiacion-ionizante","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/destinos-alternativos-de-celulas-proliferantes-de-plantas-tratadas-con-radiacion-ionizante\/","title":{"rendered":"Destinos alternativos de c\u00e9lulas proliferantes de plantas tratadas con radiaci\u00f3n ionizante"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Jes\u00fas \u00e1ngel Carballo Gonz\u00e1lez-corroto <\/strong><\/h2>\n<p>La dosis de 31,5 gy de rayos x redujo a la mitad (c50) la longitud de las ra\u00edces de allium cepa l., Previamente creciendo en condiciones de equilibrio din\u00e1mico, en relaci\u00f3n a las no irradiadas, 96 horas despu\u00e9s de dicha irradiaci\u00f3n. la inhibici\u00f3n del crecimiento de la ra\u00edz result\u00f3 ser funci\u00f3n lineal del logaritmo de la dosis de irradiaci\u00f3n previa, en el rango de dosis estudiadas (entre 2,5 y 40 gy).  el tama\u00f1o de los nucleoides obtenidos por desnaturalizaci\u00f3n alcalina a ph 12,2 de n\u00facleos aislados incluidos en microgeles, se increment\u00f3 con la dosis de radiaci\u00f3n previa. El dna monocatenario detectado por fish en dichos nucleoides, resultante de las roturas y de los sitios l\u00e1biles a alcalinidad en el genoma, formaba un anillo en el interior de la envoltura nuclear en ausencia de radiaci\u00f3n y a dosis bajas de \u00e9sta. Dicho dna se distribu\u00eda en focos dispersos por todo el nucleoide en las irradiadas. dichos focos se resuelven a veces en peque\u00f1as subunidades homog\u00e9neas que siguen l\u00edneas perpendiculares al per\u00edmetro del nucleoide.  la citometr\u00eda de flujo mostr\u00f3 que, en las primeras 24 h despu\u00e9s de la irradiaci\u00f3n, se produce una acumulaci\u00f3n de c\u00e9lulas en g2, con contenido 4c, a la vez que disminuyen las mitosis en la poblaci\u00f3n meristem\u00e1tica, como mostraba, el \u00edndice mit\u00f3tico y la presencia de fosfoprote\u00ednas mit\u00f3ticas, aisladas en inmunotransferencias y reconocidas por el anticuerpo mpm2. A tiempos mayores que la duraci\u00f3n de un ciclo medio control (16 h), la bajada en c\u00e9lulas g2 acumuladas va seguida de una ola mit\u00f3tica tard\u00eda.  la parada de c\u00e9lulas en g2 inducida por rayos x es consecuencia de la activaci\u00f3n de la ruta de chequeo de da\u00f1o en el dna que controla la entrada en mitosis. as\u00ed:  a,- dicha acumulaci\u00f3n es transitoria.  b,- la ola mit\u00f3tica que sigue est\u00e1 formada por c\u00e9lulas con fracturas cromos\u00f3micas, demostrando que se ha producido el proceso conocido como \u00abadaptaci\u00f3n\u00bb sin reparaci\u00f3n pre<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Destinos alternativos de c\u00e9lulas proliferantes de plantas tratadas con radiaci\u00f3n ionizante<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Destinos alternativos de c\u00e9lulas proliferantes de plantas tratadas con radiaci\u00f3n ionizante <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Jes\u00fas \u00e1ngel Carballo Gonz\u00e1lez-corroto <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 04\/03\/2003<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>quintana Consuelo De La Torre Garc\u00eda<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jorge Fern\u00e1ndez l\u00f3pez-s\u00e1ez <\/li>\n<li>nicolas Jouve de la barreda (vocal)<\/li>\n<li>ricardo Paniagua g\u00f3mez-\u00e1lvarez (vocal)<\/li>\n<li>cesar Gomez campo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Jes\u00fas \u00e1ngel Carballo Gonz\u00e1lez-corroto La dosis de 31,5 gy de rayos x redujo a la mitad (c50) [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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